Answer:
2090 Joules
Explanation:
Heat energy is calculated by multiplying the mass of a substance by its specific heat capacity and by change in temperature.
That is;
Quantity of heat = Mass × specific heat capacity × change in temperature
Q = m×c × ΔT
In this case; we need to calculate the heat energy released by water
Mass of water = 50.0 g
Specific heat capacity of water = 4.18 J/g°C
Change in temperature = 10 °C ( 70°C - 60°C)
therefore;
Heat released = 50 g × 4.18 J/g°C × 10 °C
= 2090 Joules
Thus, the heat energy released when 50 g of water is cooled from 70°C to 60°C is 2090 Joules
